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Re: Problems after upgrading from 7.4.6 driver to 8.0.2

From: Mark Lewis <mark(dot)lewis(at)mir3(dot)com>
To: pgsql-jdbc(at)postgresql(dot)org
Subject: Re: Problems after upgrading from 7.4.6 driver to 8.0.2
Date: 2005-04-26 00:00:37
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-jdbc
Sorry for the noise, just after posting I finally tracked it down to a
problem in the application.  In one code path a prepared statement was
being double-closed, which apparently triggers a bug in the version of
DBCP being used.

I'm still not sure why it only started misbehaving after upgrading the
JDBC driver.

-- Mark

On Mon, 2005-04-25 at 16:38, Mark Lewis wrote:
> After upgrading from pg74.215.jdbc3.jar to postgresql-8.0-310.jdbc3.jar,
> I've encountered problems getting a "This statement has been closed"
> exception when using a PreparedStatement.
> The application is using Jakarta's DBCP 1 connection pooling with
> prepared statement caching, and is configured to execute "select 1" each
> time a connection is checked out from the pool to ensure that the
> connection is still alive, so I'm pretty sure the server connection is
> still good.
> Are there any known gotchas migrating to the new server prepared
> statement implementation?  Something that could be causing statements to
> close when they otherwise would not be?
> Thanks,
> Mark Lewis
> Thanks,
> Mark Lewis
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster

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